Tuyere



Feb. 13, 1934. J. c. GOSS ET AL TUYERE Filed Aug. 7, 1931 Jfi/ ETIENITORS Patented Feb. 13, 1934 UNITED STATES PATENT OFFICE TUYERE John C. Goss and Harry L. Crispen, Pittsburgh, Pa.

1 Claim.

Our invention relates to certain new and useful improvements in tuyeres, of the type employed in connection with stoking apparatus for delivering fuel and air to the combustion chamber of a boiler or furnace.

Important objects of the invention are to provide a tyere of the character described, which will deliver a maximum supply of air to stimulate combustion, and which embodies a plurality of interlocking tuyre blocks and that cannot become displaced during the normal stoking operation.

Further objects of the invention are to provide a device of the class stated, which is simple in its construction and arrangement, strong, durable and eflicient in its use, compact, attractive in appearance, readily cleaned, positive in its action, and comparatively inexpensive to manufacture, install and operate.

With the foregoing and other objects in view which will apear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention hereinafter dis closed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing wherein like numerals of reference designate corresponding parts throughout the several views:

Figure 1 is a front view of a pair of interlocked tyre blocks constructed in accordance with the invention.

Figures 2 and 3 are respective side views of a tuyere block.

Figure 4 is a back view thereof.

Figures 5 and 6, are, respectively, top plan and side views of our improved tuyere with a part of the tuyre blocks removed therefrom.

Referring in detail to the drawing 1 denotes the tuyre pot, which is communicably joined with the conveyer tube 2. The screw conveyer 3 is revolubly mounted in the latter and projects into the pot 1, and when operating forces the fuel through the tuyre structure into the combustion chamber of the furnace in the usual manner.

The top of the pot 1 carries a rectangularlyshaped supporting frame 4, which comprises spaced inner and outer portions, respectively indicated at 5 and 6, providing a frame slot '7 therebetween.

The feature of the present invention resides in Serial No. 555,788

the construction, combination and arrangement of the integrally formed parts of the tuyere blocks 8, which are identical relatively to each other.

Each of the tuyere blocks 8 comprises a vertically disposed wall 9 provided with a large opening 10. The wall 9 is disposed at the left side of the tuyere block 8 and the left side 11 thereof extends on an even plane throughout its area except for the opening 10 and the plurality of a shallow recesses 12. The latter are disposed horizontally in superposed relation and extend from the inner face 13, of the tuyere block 8, to the front side of the opening 10 formed in the wall 9.

It will here be noted that application of the terms inner, outer, right and left, as employed in the description of the tuyere blocks 8, is made relatively to the disposition of the latter in the tuyere structure and to agree with the showing in Figure 1, the fronts 13, of the tuyere blocks 8 facing toward the interior of the tuyre pot 1. a The block wall 9 is provided with an enlarged upper bar 14, an enlarged lower bar 15, and a plurality of comparatively thin intermediate bars 16. The bars 14, 15 and 16 are disposed laterally horizontal and spaced from each other on the right side 17, of the wall 9, and extend from the block front 13 to the inner side of the opening 10.

The free ends of the intermediate bars 16 project beyond the free ends of the upper and lower bars 14 and 15 a distance commensurate to the depths of the recesses 12. The recesses 12 are horizontally aligned with respective intermediate bars 16, and the projecting free ends of the latter, of any one tuyre block 8, engage and seat in respective recesses 12 of the adjacent tuyere block 8, which is disposed at the right side thereof, as clearly illustrated in Figure 1.

The formation of the bars 14, 15 and 16 provides interstices 18 therebetween, for the passage and circulation of the air supply employed for stimulating combustion.

The front 13 of the tuyere block 8 is preferably inclined the upper end thereof being disposed outwardly with respect to the lower end thereof. The inclining disposition of the block front 13 retards the entrance of fuel into the interstices 18 to prevent clogging of the latter, and further facilitates the movement of the fuel through and over the tuyre structure during the stoking operation.

The lower edge 19 of the wall 9 is horizontally no aligned with the lower end of the lower bar 15, and a connecting lip 20 depends from the back of the latter and is of a width conforming to the width of said lower bar 15.

The upper end of wall 9 is comparatively narrow, and carries a top bar 21. The latter is disposed laterally to the right, and provides an air passage 22 between same and the upper end of the upper bar 14.

A substantially L-shaped tying lip 23 is carried by the wall 9. The tying lip 23 extends laterally to the right, and the vertical portion 24 thereof is disposed directly at the back of the upper bar 14 and the uppermost of the intermediate bars 16. An air passage 25, communicating with the air passage 22, is provided between the vertical tying lip portion 24 and the bars 14 and 16, which are disposed inwardly of the latter.

A seating lug 26 is provided on the right side 7 of the wall 9 and disposed on the back lower corner of the latter.

In assembling the tuyere blocks 8 on the tuyere structure, the same are disposed vertically on the frame 4. The connecting lip 28, of each tuyere block 8, extends through the frame opening '7 and engages the inner frame portion 5, and the back margin of the lower edge 19 of the wall 9 and the lug 26 seat upon the outer frame portion 6, as clearly illustrated in Figure 3.

The tuyere blocks 8 are positioned closely against each other on the supporting frame 4, with the free projecting ends of the intermediate bars 16 of any one of the tuyere blocks 8 engag ing and interlocking in respective recesses 12 of the adjacent tuyre block 8 disposed at the right thereof, as shown in Figure 1. Such interlocking engagement of the tuyere blocks 8 will prevent the individual displacement of any of the latter in the tuyere structure during the stoking operation.

Suitable corner blocks 27 are provided, the superficial configuration of which corresponds to superficial conformation of the tuyere blocks 8, to establish an endless or continuous grate structure extending uniformly and uninterruptedly" around the entire supporting frame 4.

The tuyre blocks 8 and corner blocks 27, when assembled on the supporting frame 4., as

stated, are secured in their relative positions by a pair of tie-bands, respectively indicated at 28 and 29. The tie-band 28 extends around and engages the lower ends of the back edges 30 of the tuyere block walls 9 and of the corner blocks 27, and seats upon the outer edge margin of the top of the outer frame portion 6. The other tieband 29 is mounted in the tying lips 23 of the tuyere blocks 8 and of the corner tuyere 27, the tying lips of the assembled grate and corner tuyre forming a continuous groove extending around the entire grate structure, adapted for the reception of the tie band 29.

The construction of the tuyere blocks 8 and their assembly on the prescribed supporting frame 4, in the manner herein set forth, provides a most efficient device of its kind, as the air supply employed for stimulating combustion can readily and freely enter, pass and circulate through all portions of the grate structure in every direction.

What we claim is:

In combination, a tuyere block comprising a vertically disposed wall provided with a large opening, a plurality of spaced bars extending laterally from one side of said wall and being disposed forwardly of said opening, the upper and lower of said bars being enlarged, the free ends of the bars disposed intermediately of said upper and lower bars projecting beyond the free ends of the latter, the other side of said wall being formed with a plurality of recesses horizontally aligned with and extending parallel to respective intermediately disposed bars, the depths of said recesses corresponding to the lengths of the projecting portions of said intermediately disposed bars, a substantially L-shaped tying lip extending laterally from said wall, the vertical portion of said tying lip being spaced from and disposed directly back of the said upper bar providing a JOHN C. GOSS. HARRY L. CRISPEN. 

